Paste-tube.



No. 851,586. PATENTED APR. 23, 1907.

- W. L. CLARK.

PASTE TUBE.

APPLICATION FILED DEC. 29, 1905.

- ders and the UNITED STATES PATENT OFFICE.

. WALTER L. on NEW YORK, N. Y. i

' PASTE-TUBE.

Specification of Letters Patent.

Patented April 23, 1907.

- Application filed December 29,1905. Serial No. 293.761.

To alt whom it may concern:

Be it known that I, WALTER L. CLARK, a' citizen of the United States, and a resident of New York,in the county of New York and State of New York, have invented certain new and useful Im rovements in Paste- Tubes, of which the 'ollowing is a specification.

This invention relates to packages or receptacles for asty or viscous materials, ow-

l ike, and is more particular y intended to provide a simple and inexpensive construction of that type of receptacle which comprises a rigid or noncollapsible tube in .which the material is contained and from which it is forced by means of apiston originally located behind the mass of material contained in the tube, said piston being pushed forward by suitable means to'whatever extent is necessary to force any desired quantity of material out of the mouth of the tube.

In the accompanying drawings, Figure 1 is a central longitudinal section through a receptacle constructed in a'ccordance with my invention, and Fig. '2 is a cross section on the linexminFi .1. Y

My receptatfie isrepresented in the drawings as consisting of a cylindrical tube 2 having at one end an open mouth or outlet 3 which is normally closed by a cap 4 of the" constructed of various materials and may be usual, construction.

l 5 represents a piston'which is originally cated .at the opposite or closed end of the tube 2, or behind the material with which the tube is filled, and fi represents a small rod or stifi': wire which asses centrally through the T piston and the c osed end of the tube and is provided at its outer or exposed end with a ead or thumb piece? by which it is operated. The rod 6 is also provided with anum ber of teeth or barbs 8 which point forward or toward the mouth of the tube 2, and the construction of the piston 5 is such that when the rod 6 is drawn outward its teeth 8 will passwith comparative freedom through the piston, while upon pushing said rod in the opposite direction said teet will enga e the piston and force it forward, thus expe ling a certain quantity of the material through the mouth of. the tube, according to the distance f through which the piston- 1s mbved, Said 6, prefe1'.ably has substantiallythe same scribed.

any desired distance, until all the material ori inally contained in the tube has been expel ed therefrom. By preference the piston 5 is composed of a disk of thick felt which fits the interior of the tube 2 with such tightness that when the rod 6 is drawn outward the frictional resistance to the movement of the piston will be greater than the resistance encountered by said rod in passing through the piston, while when the rod 6 is forced inward the frictional resistance between the piston and the tube will be overcome by the force applied to the piston through the medium of the rod and its engaging teeth 8. However, the described arrangement will be operative even though the piston slides in the tube with such freedom that it will be drawn back with the rod 6 upon an outward movement of the latter, since in this case such backward movement of the piston will be sto ped as soonas the piston reaches the close end of the tube, whereupon a further outward movement of the rod will provide foradvancing the piston through the desired distance when said rod is again pushed inward. It will be evident that the piston may be arranged tobe engaged and pushed forward 1) the rod in various other ways than that a ove described without departing from the principle of my invention.

I claim as my invention:

1. A receptacle for viscous or powdery materials comprising a rigid tube having an outlet at one-end and containing adpiston made of yielding material and adapte to be located at the opposite or closed end of the tube, behind the material contained therein, in combination with a longitudinally-movable rod passing through the iston and one end of the tube and provide with slanting teeth which ointforward in the direction of the outlet of said tube, substantially as de- 2. A receptacle for viscous or powdery materials comprising a rigid tube having an outlet atone end and containing a piston 1 nade of felt and adapted to be located at the 12' eta-i111 contained therein, and alongitudi- December. 1905.

VVALTEK LCLARL.

nmi -movafifle rod passing through the pisopjaesite er closed end of the tu'be,bei1indthe 1 scribed my name this twenty-second of i ton and the closed end of the tube and prol vided with forwardly-pointing teeth, sub- Witnesses:

sm ntially as described. F. S. TUTTLE,

111 testimonywhereot, I have hereunto sub- M. E. STODDART. 

